Press Release: Showtime Sports has hired former HBO boxing chief Ross Greenburg to serve as executive producer on two key pieces of programming. Working with Showtime for the first time since rsigning from HBO, Greenburg will produce content designed to generate interest in the Floyd Mayweather-Robert Guerrero pay-per-view fight Showtime will be staging. On Wednesday, April 10th, Showtime Sports will debut the latest chapter of its original documentary series All Access (10 p.m. ET/PT). Greenburg will serve as an executive producer as the series takes viewers into the dramatic and unpredictable world of prize fighting. CBS Television will broadcast a special one-hour documentary titled “Mayweather” on Saturday, April 27th, at 8 p.m. ET/PT. Greenburg will executive produce this film, which reveals the life story of Floyd “Money” Mayweather. The program also examines the hard-working approach taken by Guerrero, who has endured incredible challenges on the road to this May 4th mega fight.